Add more detail to TypeMismatch error

1 files changed, 12 insertions, 0 deletions

diff --git a/dhall/tests/type-errors/unit/MergeHandlerNotMatchAlternativeType.txt b/dhall/tests/type-errors/unit/MergeHandlerNotMatchAlternativeType.txt
index 69428b8..3f6c6a6 100644
--- a/dhall/tests/type-errors/unit/MergeHandlerNotMatchAlternativeType.txt
+++ b/dhall/tests/type-errors/unit/MergeHandlerNotMatchAlternativeType.txt
@@ -1 +1,13 @@
 [unknown location] Type error: Wrong type of function argument
+ --> 1:38
+  |
+1 | merge { x = λ(_ : Bool) → _ } (< x : Natural >.x 1)␊
+  |                                      ^-----^
+  |
+  = This argument has type Type
+ --> 1:19
+  |
+1 | merge { x = λ(_ : Bool) → _ } (< x : Natural >.x 1)␊
+  |                   ^--^
+  |
+  = But the function expected an argument of type Value@WHNF { value: AppliedBuiltin(Bool, []), type: Type }